LAPACK
3.6.1
LAPACK: Linear Algebra PACKage

Functions  
subroutine  sgtsv (N, NRHS, DL, D, DU, B, LDB, INFO) 
SGTSV computes the solution to system of linear equations A * X = B for GT matrices More...  
subroutine  sgtsvx (FACT, TRANS, N, NRHS, DL, D, DU, DLF, DF, DUF, DU2, IPIV, B, LDB, X, LDX, RCOND, FERR, BERR, WORK, IWORK, INFO) 
SGTSVX computes the solution to system of linear equations A * X = B for GT matrices More...  
This is the group of real solve driver functions for GT matrices